He probably misunderstood smth from back then and is blaming himself for events that happened to Haneul and that's why he hates himself and has low self-esteem proclaiming he doesn't deserve to be with her bc he blames himself and is hurting inside bc of the guilt he feels. Now it feels kinda relatable. I could see myself beating myself up from the inside if someone was so dear to me and I felt like it's my fault something happened to them. Kinda makes me remember how I felt when a close friend of mine took their life and I was the last person to text with them...so yeah. I get that feeling of regret and blaming oneself even if it wasn't something to feel sorry for.
He probably misunderstood smth from back then and is blaming himself for events that happened to Haneul and that's why he hates himself and has low self-esteem proclaiming he doesn't deserve to be with her bc he blames himself and is hurting inside bc of the guilt he feels. Now it feels kinda relatable. I could see myself beating myself up from the inside if someone was so dear to me and I felt like it's my fault something happened to them. Kinda makes me remember how I felt when a close friend of mine took their life and I was the last person to text with them...so yeah. I get that feeling of regret and blaming oneself even if it wasn't something to feel sorry for.